#define  _CRT_SECURE_NO_WARNINGS 1

#include<stdio.h>
//#include<string.h>
#include<assert.h>

int my_strcmp(const char* str1,const char* str2)
{
	assert(str1 && str2);
	while (*str1== *str2) {
		str1++;
		str2++;
	}
	return *str1 - *str2;
}

int main()
{
	char arr1[] = "abcd";
	char arr2[] = "abcf";
	int ret = my_strcmp(arr1, arr2);
	if (ret == 0)
	{
		printf("=\n");
	}
	else if (ret > 0) {
		printf(">\n");
	}
	else
		printf("<\n");
	return 0;
}